Wisconsin doesn't license mold work. See how we verify Wisconsin pros
Serving Madison, WI, Keystone Environmental LLC is a verified mold professional specializing in removal and remediation. Highly rated at 5.0/5.0 based on 18 customer reviews.
Based on 18 reviews
Aggregated from public review platforms
Review Strength
Scored out of 100: up to 55 points for review volume, 35 for rating quality, and ±10 for standing against the local average.
What mold remediation professionals do
Professional removal and treatment of mold growth in residential and commercial properties. Includes containment, HEPA filtration, antimicrobial treatment, and post-remediation verification.
Emergency water extraction, structural drying, dehumidification, and restoration following floods, leaks, or plumbing failures.
Wisconsin has no state mold remediation license, so any company can legally offer mold work there. That's why we verify Wisconsin pros directly: business identity, location, and reputation, plus insurance and industry certifications when provided.
Regulatory facts last reviewed June 2026.
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